毕业论文-感应式门铃的设计.doc

感应式门铃的设计 摘要 本设计的红外线感应电子门铃，有两种功能：迎宾和防盗。当主人在家的时候可以开启迎宾功能，门铃可以感应到来宾并发出音频信号以通知主任“有客来访”。当主人要离开家时，可开启防盗功能。在启动防盗20秒后（为了防止误把主人当做小偷），启动布防。电路能探测人体发出的红外线，该红外线感应电子门铃电路由红外线发射电路、红外线接收电路、低频振荡器、音频振荡器和音频输出电路等组成。当人进入感应的区域内，即可发出铃声或者报警声，适用于家庭、办公室、仓库、实验室等比较重要场合的铃声和报警。概述了红外辐射的知识、反射式红外传感器的结构和工作原理。利用反射式红外传感器设计了一种被动式红外报警电路,分析了该电路的功能和工作原理。反射式红外传感器具有很多的优点,在人们生活、安全、警戒等装置中应用较广。 关键词：单片机 红外线 反射式 感应门铃 The design of induction type doorbell Science and Technology of Electronic Information 11-2 Liu Zi-qi Supervisor Li-Qing Abstract The design of the infrared electronic bell, there are two kinds of functions: welcome and security. When the master in the home can be opened Welcome function, the doorbell can induction to the guest and the issue of audio signal to inform the director of the guests. When the master to leave home, can open the anti-theft feature. At the start of theft after 20 seconds (in order to prevent the misuse of the owner as a thief), start. Circuit can detect the human body emits infrared, the infrared induction electronic door bell circuit is composed of an infrared emission circuit, infrared receiving circuit, a low frequency oscillator, audio oscillator and an audio output circuit. When people enter the area of the induction, you can send out the sound of the ring or alarm, for family, office, warehouse, laboratory and other important occasions of the bell and alarm. The structure and working principle of infrared radiation and reflective infrared sensor are summarized.. A passive infrared alarm circuit was designed by using reflective infrared sensor, and the function and working principle of the circuit were analyzed.. Reflective infrared sensor has a lot of advantages, and it is widely used in peoples life, safety and security..Keywords: single chip infrared reflection type sensor doorbell Key words: single chip infrared reflection type induction doorbell 目录 第一章 绪论 1 1.1课题